Peter Wrighton, 83, of Banham, who was murdered in East Harling. Picture Norfolk Constabulary

As a 16-year-old Palmer, formerly of Old Buckenham, received a top grade after a gruelling selection process and in September 2010 was due to start training at the Army Foundation College in Harrogate.

An British Army spokesman confirmed he served in the army from September 2010 to November 2015.

A number of members of the public, thought to include his fiancée, appeared to be supporting Palmer in court.

Police said The Street in East Harling remains closed whilst the investigation continues and officers are still working in the area, providing reassurance, speaking with witnesses and conducting house to house and CCTV enquiries.

Detectives are also searching and forensically examining a number of locations, including at Cringleford and Bawdeswell, where police confirmed Palmer was arrested, which are linked to the investigation.

Ronald Mercer, who lives near to the sealed off property in Bawdeswell, said he saw someone being arrested and put in an unmarked car at about 11.30am on Saturday.